| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide higher brightness by specifying a focus distance on a paraboloidal first reflection surface whose focus point is at a light source, a front view area of a paraboloidal second reflection surface whose focus point is an outlet of a light guide path therefor, an advance angle and a focus distance of second focus point of an elliptical third reflection surface, whose first and second focus points are at the light source and the light guide path, on an outer side of a vehicle body and a inner side of a vehicle body whose horizontal section extends. SOLUTION: A size in horizontal section of an inner side of a vehicle body is larger than that of an outer side thereof, centering a light source. The ratio of focal distances between a lamp inner side 21a of a vehicle body inner surface 21 of a first reflection surface 2 which a light guide path 3 penetrates backward and a lamp outer side 21b and between a lamp inner surface 22a of a vehicle body outer surface 22 and a lamp outer surface 22b, are set at not less than 0.6:1. A vehicle body inner surface 51 of a third reflection surface 5 has a larger advance angle of a second focus to a first focus than that of a vehicle body outer surface 52 and has a focal distance ratio of not less than 0.6:1. A vehicle body inner surface 41 of a second reflection surface 4 has a front view area larger than that of a vehicle body inner surface 42. With these designs, the amount of reflection light is increased for improved efficiency.</p> |
